ID   4.2.3.156
DE   hydroxysqualene synthase.
CA   H2O + presqualene diphosphate = diphosphate + hydroxysqualene.
CC   -!- This enzyme, isolated from the bacteria Rhodopseudomonas palustris
CC       and Zymomonas mobilis, participates, along with EC 2.5.1.103 and
CC       EC 1.17.18.1, in the conversion of all-trans-farnesyl diphosphate to
CC       squalene.
CC   -!- Eukaryotes achieve the same goal in a single step, catalyzed by
CC       EC 2.5.1.21.
DR   Q6N3F1, HPNC_RHOPA ;  P55351, HPNC_SINFN ;  Q5NP67, HPNC_ZYMMO ;
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